When you learn a language, make sure you're learning it to do something -- even if it's just to make a task list. If you pick a "something" that should be done with more than one language naturally (for example, building a website using C# and JavaScript), then it only makes sense to learn more than one language simultaneously. So, yes it's very possible for that to be a good idea, just not the way you're describing it.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
When you learn a language, make sure you're learning it to do something -- even if it's just to make a task list. If you pick a "something" that should be done with more than one language naturally (for example, building a website using C# and JavaScript), then it only makes sense to learn more than one language simultaneously. So, yes it's very possible for that to be a good idea, just not the way you're describing it.